Corn-Corn Guidelines

The greatest losses in corn yields, in continuous corn rotations, occur in high-yielding environments. Iowa State Extension Agronomist Roger Elmore compared the same corn hybrids across 26 Midwestern locations and found a 0-30 bu. advantage for corn following beans compared to corn following corn. On average, continuous corn yields suffer a 9% yield drag over those rotated with soybeans, he says. Stacked hybrids with insecticide treatments can help to mitigate these losses, he says.